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World Products
Engine Blocks & Cylinder Heads
| Small Block Chevy, Big Block Chevy, Small Block Ford blocks & heads with affordable prices from RPM |
RPM - RON'S PRECISION MACHINE, INC.
69 E. 580 N.
Santaquin, Utah 84655
https://www.rpmrons.com
1-801-754-5338 or Toll free 1-866-700-5877
Hours 9-5 Monday-Friday |
| Engine Rebuild Kit and Parts Online Catalog. |
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Hours: 9:00 AM to 5:00 PM Monday - Friday Mountain Time (Utah) Call toll free to purchase at: 1-866-700-5877 We do not ship timing sets and components outside the U.S. |
| World Products has been producing affordable high performance cast iron engine blocks and cylinder heads for over twenty five years, beginning with a pioneering small block Chevrolet cylinder head and continually expanding the line to become a leading aftermarket manufacturer. World Products aftermarket cast iron division was acquired by new ownership in October of 2012, shortly before the SEMA show. The first step was to immediately set about implementing a series of production improvements to ensure that the World Products brand will represent a quality product in every possible way. The foundry tooling was evaluated and freshened where necessary. World castings are made in the USA from high strength iron alloy. Machining operations have been moved to a new facility and utilize state-of-the-art CNC machining centers manned by experienced technicians. An all new, stringent quality control program has been implemented with hands-on monitoring and sophisticated CMM inspection procedures. Customer service is a top priority at World. Engine blocks and cylinder heads are kept in stock in World’s warehouse in order to facilitate fast delivery to virtually any part of the country |
| At World Products we listen to what our customers needs are and we are constantly changing our products to keep up to date with the latest technology and engine combinations. We offer only high quality components, our products are suited to various performance levels from street, drag racing, oval track and professional venues. |
Warranty Policy from World Products
LIMITED ONE YEAR WARRANTY
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World Products warrants to the original purchaser only that products
sold by World Products under the name World Products are free
from defects in material and workmanship, and against excessive
wear under normal use for a period of one (1) year from the date
of purchase. World’s obligation under this warranty is limited
to the repair or replacement of covered products and only when
the product has been returned, freight prepaid to 7301 Global
Drive, Louisville, Ky 40258. World Products retains sole discretion
in determining defective merchandise. There are no warranties
which extend beyond the description on the face hereof. It is
the responsibility of the installer to ensure that all components
are correct before installation. Proper assembly always requires
that the installer measure all tolerances for proper clearance.
World Products assumes no responsibility for any error made in
tolerances, component selection or installation and this warranty
does not cover any labor, diagnostics, removal, inconvenience,
towing and/or any other damages or expenses.There is absolutely
no warranty, implied or otherwise, on any product used in competition/racing
applications, any product that has been physically altered, improperly
installed, abused, or not used in conjunction with proper parts.
There is no warranty, implied or otherwise, of merchantability
or fitness for a particular purpose. Where required by law, implied
warranties of merchantability and fitness are limited for a term
of one (1) year from the date of original purchase. World Products
will not be responsible for incidental and consequential damages,
property damage or personal injury to the extent permitted by
law. This limited warranty gives you specific legal rights. You
may have other legal rights, which vary from state to state.
This warranty shall apply only within the boundaries of the continental
United States. World Products reserves the right to make necessary
changes in products it manufactures and markets at any time to
improve product performance. These changes in products will be
made without obligation to change or improve products that were
previously manufactured. WARNING: Some products sold by World Products have been designed and are intended for Off-Highway application only. Installation on a vehicle intended for use on public roads may violate U.S., Canadian, State or Provincial laws and regulations including those related to emission requirements and motor vehicle safety standards. Purchaser bears full risk of any such violation. |
| This catalog has been completed using our best efforts for accuracy and correctness. We assume no liability for any errors contained herein. This catalog, the information contained herein, including part numbers are copyrighted property of World Products. World Products is a registered trademark. |
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World Products has developed a refined version of its popular MOTOWN block in the form of the MOTOWN II for small block Chevrolet applications. The MOTOWN II can be bored to a maximum of 4.200” and is clearanced for a 4.000” crank. The oil system features an integral boss for front and rear oil feed. The rear main cap has provisions for a wet sump pump. The valley has crossfeed lines between left and right lifter oil galleys.  |
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Like all World blocks and heads, the Motown II is 100% American made. World’s |
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new digital inspection equipment and quality verification procedures ensure dimensional accuracy and mean you can be assured of total quality and superior performance.  |
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= High density cast iron construction = Priority main oiling = Expanded water jackets = Bores to 4.200” (3.995” or 4.120” std.) = Cylinder walls .250” @ 4.200 = 350 or 400 mains = Nodular or billet main caps = Clearance for 4.000” stroke crank = 2.000" cam bore std. = 9.025” stock deck height = Splayed 4-bolt main caps w/dowels & stepped register, ARP fasteners = Accepts standard SBC components = Dual motor mounts = Provision for dry sump = OE style fuel pump & starter mounts = Approximately 200 lbs.
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 Billet timing sets are available for this application. Part # 8981TRC or 8981TARC w/ adjustable upper gear. |
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World’s Motown II RC small block provides an ingenious solution to a long standing problem. By raising the camshaft location in the block +.134”, World Products has created a robust platform for big inch small blocks which upgrades the cam journal to a BBC 2.120” bore. The MOTOWN II RC also features bushed lifter bores in your choice of .842” or .904”. These upgrades provide exceptional valve train stability at high rpm operation. Raising the cam location also allows clearance for the use of H-Beam connecting rods with a 4.000” stroke crankshaft for greater bottom end strength. |
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Standard small block style oil pans, timing covers, intakes and other components are used. |
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= High density cast iron construction = Raised cam location +.134" = BBC 2.120” cam bearing bore = Bushed lifter bores (.842 or .904) = Clearance for 4.000” stroke w/H-beam rods = Priority main oiling = Expanded water jackets = Bores to 4.200” (4.120” std.) = Cylinder walls .250” @ 4.200 = 350 or 400 mains = 9.025” stock deck height = Splayed 4-bolt billet main caps w/dowels & stepped register, ARP studs = Dual motor mounts = Provision for dry sump = OE style fuel pump & starter mounts = Approximately 200 lbs. |
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Torque Specs Mains: TQ 7/16 Inner Main Bolts 70 FT.LB. TQ 7/16 Front & Rear Outer Bolts 70 FT.LB. TQ 7/16 Center Splayed Bolts 70 FT.LB. |
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World’s new Motown Pro Light-Weight block offers tremendous performance potential in a new lightweight package that will appeal to both circle track racers and drag racers. Weighing in at a nominal 178 lbs, the Motown Pro Light-Weight is cast from a special 40,000 psi iron alloy for increased strength while weighing significantly less than typical aftermarket blocks. The new block is available with either a standard SBC cam journal and lifters, or with a BBC cam journal and .904” lifter bores to provide enhanced valve train stability and performance. |
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Ductile iron main caps are fitted with 4- bolt splayed caps on #2, 3 & 4 and 2-bolt caps for #1 & 5 which allow easy oil pan fitment. The main caps are secured by high strength 7/16” ARP bolts for maximum stability. |
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= 40,000psi cast iron construction = 178 lbs. average weight = Standard SBC or BBC 2.120” cam bore = .842 or .904 lifter bores = Clearance for 4.000” stroke = Priority main oiling = Expanded water jackets = Bores to 4.185” = 350 mains = 9.025” stock deck height = Splayed 4-bolt main caps on #2, 3 & 4 = Ductile main caps = ARP main bolts = Provision for oil restrictors = OE style fuel pump & starter mounts |
| Part No. |
Deck Ht. |
Bore |
Cam Loc. |
Cam | Lifters | Mains | Caps |
| 083010 $3,228.49 | 9.025 | 3.995 | Std. | SBC | .842 | 350 | Nodular |
| 083020 | 9.025 | 4.120 | Std. | SBC | .842 | 350 | Nodular |
| 083010 $3,228.49 BBC | 9.025 | 3.995 | Std. | BBC | .904 | 350 | Nodular |
| 083020 BBC | 9.025 | 4.120 | Std. | BBC | .904 | 350 | Nodular |
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The Motown LS block allows the use of high flowing LS style cylinder heads with affordable SBC rotating assemblies and related components. The camshaft location has been raised in the block by +.134” and the block now comes standard with a 55mm cam tunnel. This design allows clearance for the use of a 4.000” stroke crankshaft, and the large cam core provides for exceptional valve train stability at high RPM operation. Bushed lifter bores are standard with a choice of .842” or .904” diameter. The Motown LS can be built with carburetor or EFI induction and distributor or crank trigger ignition. A standard LS 9.240” deck height means off the shelf LS intake manifolds can be used. The Motown LS makes LS swaps into classic chassis easy! |
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= High density cast iron construction = Uses high-fl owing LS cylinder heads = LS style reverse fl ow cooling = 9.240” stock LS deck height = Uses affordable SBC rotating assemblies = Raised SBC cam location +.134" = Clearance for 4.000” stroke w/H-beam rods = 55mm babbit cam bearing bore = Bushed lifter bores (.842 or .904) = Priority main oiling = Bores to 4.200” (4.120” std.) = Cylinder walls .250” @ 4.200 = 350 SBC mains = Splayed 4-bolt main caps w/dowels & stepped register, ARP fasteners = SBC style motor mounts = SBC style fuel pump & starter mounts |
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| Part No. |
Deck Ht. |
Bore |
Cam Loc. |
Cam | Lifters | Mains | Caps |
| 084080 $3,364.80 | 9.240 | 3.995 | +.134 | 55mm | .842 | 350 | Nodular |
| 084080-904 $3,637.63 | 9.240 | 3.995 | +.134 | 55mm | .904 | 350 | Nodular |
| 084081 $3,364.80 | 9.240 | 4.120 | +.134 | 55mm | .842 | 350 | Nodular |
| 084081-904 $3,637.63 | 9.240 | 4.120 | +.134 | 55mm | .904 | 350 | Nodular |
| 084180 $3,992.36 | 9.240 | 3.995 | +.134 | 55mm | .842 | 350 | Billet |
| 084180-904 $4,316.07 | 9.240 | 3.995 | +.134 | 55mm | .904 | 350 | Billet |
| 084181 $3,992.36 | 9.240 | 4.120 | +.134 | 55mm | .842 | 350 | Billet |
| 084181-904 $4,316.07 | 9.240 | 4.120 | +.134 | 55mm | .904 | 350 | Billet |
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Valley plates for carburetor or LS efi intakes  |
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Cylinder head end plates to adapt SBC accessories  |
ARP head stud kit |
Water return kits Pro-Lok or Braided Steel Hose |
Hydraulic or solid roller camshaft |
Billet timing sets |
Durabond cam bearings |
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The Merlin block has earned a reputation for providing reliable big-inch power, and this 3rd edition has been refined from design, manufacturing and quality control standpoints. To ensure total customer satisfaction every block is subjected to stringent quality control standards. The MERLIN III can be bored to a maximum of 4.625” and 9.800 deck blocks are clearanced for a 4.375” stroke and 10.200 deck blocks are clearanced for a 4.750” crank. With a reinforced bottom end featuring 4-bolt splayed main caps, the MERLIN III can handle serious horsepower with complete reliability. World’s digital inspection equipment and quality verification procedures ensure dimensional accuracy and mean you can be assured of total quality and superior performance. |
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= High density cast iron construction = Priority main oiling = Expanded water jackets = Bores to 4.625 (4.245, 4.495 or 4.595 std.) = Cylinder walls .250” @ 4.600 = Valley accomodates OE roller lifters or use +.300” tall aftermarket lifters = 9.800” or 10.200” deck heights = Clearance for 4.750” stroke (10.200” deck) or for 4.375” stroke (9.800” deck) = Splayed 4-bolt main caps w/dowels & stepped register, ARP fasteners = Standard BBC cam bearing bore = Available 55mm babbit cam & .904 lifters = OE style fuel pump & starter mounts = Approximately 270 lbs. |
Torque Specs Mains: TQ 1/2 Inner Main Bolts 100 FT.LB. TQ 1/2 Front & Rear Outer Bolts 100 FT.LB. TQ 1/2 Center Splayed Bolts 100 FT.LB. |
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World Products has redesigned the famed Merlin Big Block Chevy casting, incorporating numerous improvements and new features. Designated the Merlin IV, this new block is sure be a favorite among racers and professional engine builders. New features include thicker main webs for increased strength and thicker cylinder walls which are nominally .310” @ 4.600” bore. The oiling system is revised with enlarged passages and cross overs in front, uses simple pipe plug type restrictors, .500 oil gallery is relocated so 55mm cam does not require lifter bushings. The block will accept cam journals up to 2.480” or 60mm Babbitt and 1.060” lifter bores. Also new are deck heights from 9.500” to 9.850” and 10.200” to 10.250”. |
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NEW 396 Style Block with 4.120 Bore Non-Saimese PN 091090 = High density cast iron construction = Priority main oiling = Front oil inlet and restrictor provision = Bores to 4.625 (4.245, 4.495 or 4.595 std.) = Cylinder walls .310” @ 4.600 = Valley accomodates OE roller lifters or use +.300” tall aftermarket lifters = 9.500” to 10.250” deck heights = Clearance for 4.750” stroke (10.200” deck) or for 4.375” stroke (9.800” deck) = Splayed 4-bolt main caps w/dowels & stepped register, ARP fasteners = 2.120” BBC cam bearing bore = Available 55mm babbit cam & .904 lifters = OE style fuel pump & starter mounts = Approximately 270 lbs. |
| Part No. |
Deck Ht. |
Bore | Cam | Lifters | Caps |
| 091100 | 9.800 | 4.245 | Std. | Std. | Nodular |
| 091101 | 9.800 | 4.495 | Std. | Std. | Nodular |
| 091101- 55 | 9.800 | 4.495 | 55mm | .904 | Nodular |
| 091102 | 9.800 | 4.595 | Std. | Std. | Nodular |
| 091107 | 9.850 | 4.595 | Std. | Std. | Nodular |
| 091110 | 10.200 | 4.245 | Std. | Std. | Nodular |
| 091111 $3,238.58 | 10.200 | 4.495 | Std. | Std. | Nodular |
| 091112 $3,238.58 | 10.200 | 4.595 | Std. | Std. | Nodular |
| 091117 | 10.250 | 4.595 | Std. | Std. | Nodular |
| 091090 * | 9.800 | 4.120 | Std. | Std. | Nodular |
| *396 style with water between bores, non-siamese | |||||
| 095000 | 9.800 | 4.245 | Std. | Std. | Billet |
| 095010 | 9.800 | 4.495 | Std. | Std. | Billet |
| 095012 | 9.800 | 4.595 | Std. | Std. | Billet |
| 095013- 55 | 9.500 | 4.595 | 55mm | .904 | Billet |
| 095017 | 9.850 | 4.595 | Std. | Std. | Billet |
| 095100 | 10.200 | 4.245 | Std. | Std. | Billet |
| 095110 | 10.200 | 4.495 | Std. | Std. | Billet |
| 095110- 55 | 10.200 | 4.495 | 55mm | .904 | Billet |
| 095112 | 10.200 | 4.595 | Std. | Std. | Billet |
| 095112- 55 | 10.200 | 4.595 | 55mm | .904 | Billet |
| 095117 | 10.250 | 4.595 | Std. | Std. | Billet |
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World Products is offering a new Gen VI Big Block compatible design. This block uses a one-piece rear seal, and has the Gen VI style oil pan rail and front cover bolt pattern. The block can utilize either the OE type roller lifters or +.300” tall tie bar lifters. It also features a Mk IV style fuel pump boss and oil filter pad. The water jacket and deck surface will accommodate either Mk IV or Gen V-VI style cylinder heads, making this block extremely versatile Like all World blocks and heads, the Gen VI is American made. World’s new digital inspection equipment and quality verification procedures ensure dimensional accuracy and mean you can be assured of total quality and superior performance. |
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= High density cast iron construction = Accepts Mk IV or Gen V-VI Heads = Gen VI style 1-piece rear seal = Gen VI style oil pan rail bolt pattern = Gen VI style timing cover bolt pattern = Priority main oiling = Expanded water jackets = Bores to 4.625 (4.245, 4.495 or 4.595 std.) = Cylinder walls .250” @ 4.600 = Valley accomodates OE roller lifters or use +.300” tall aftermarket lifters = 9.800” or 10.200” deck heights = Clearance for 4.750” stroke (10.200” deck) or for 4.375” stroke (9.800” deck) = Splayed 4-bolt main caps w/dowels & stepped register, OE style fasteners = Mk IV style fuel pump & starter mounts = Approximately 270 lbs. |
*Discontinued, available while supplies last Torque Specs Mains: TQ 1/2 Inner Main Bolts 100 FT.LB. TQ 1/2 Front & Rear Outer Bolts 100 FT.LB. TQ 1/2 Center Splayed Bolts 100 FT.LB. |
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No other 302/351 style Ford block compares to the ruggedness of World Products’ MAN O’WAR family of engine blocks. World has upgraded the iron to a 40,000 psi alloy and added material to the main webs. The front web is now .080” thicker and the center three are increased by .030”. World also changed from 1/2” main cap fasteners to 7/16” ARP fasteners, leaving more material in the webs in order to strengthen the main web structure further. The Man O’War is the only SBF block with six head bolts per cylinder for secure gasket clamping and now uses standard head bolts or studs. The cylinder barrels are extended into the crankcase at the bottom by 1/2” to provide superior piston support with long stroke crankshafts. |
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= NEW 40,000psi cast iron construction = NEW Increased main web thickness = NEW 7/16 fasteners increase web strength = NEW low restriction priority main oiling = 6 head bolts/cylinder - exclusive feature = Now uses standard head bolts or studs PN Bolts 154-3603 $117.60 / Studs WPI705027 = 8.200”, 9.200” or 9.500” deck heights = Bores to 4.200” (3.995” or 4.120” std.) = Clearance for 3.500” crank w/8.200 Deck = Clearance for 4.250” crank w/9.500 Deck = Clearance for 4.000” crank w/9.200 Deck = Splayed 4-bolt main caps w/dowels & stepped register, ARP fasteners = Improved oil drain back from heads = Accepts standard SBF components = Provision for dry sump = Approximately 200 lbs. |
Torque Specs Mains: TQ 7/16 Inner Main Bolts 70 FT.LB. TQ 7/16 Front & Rear Outer Bolts 70 FT.LB. TQ 7/16 Center Splayed Bolts 70 FT.LB. |
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Stock replacement style 23° heads for small block Chevy. World’s S/R cylinder heads are the preferred alternative to expensive OEM castings or junkyard rebuilds. These heads are designed with extra-thick decks and walls for improved reliability as well as equipped with hardened steel exhaust seats that are compatible with today’s unleaded gasolines. They are machined for screw-in rocker arm studs for extra durability. S/R Cylinder heads are fully 50- state emissions legal and because they are an OEM replacement head, they are legal for use by many oval tracks and race Sanctioning organizations. |
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= Material: High density cast iron = Valve Seats: Intake (integral), exhaust (hardened) = Valve Guides: Integral cast iron = Spring Seats: Machined for 1.250” = Valve Diameter: 1.940” int, 1.500” exh (11/32” stem) = Valves: Erson stainless steel valves in assemblies = Rocker Arm Studs: Screw-in style = Rocker Arms: 1.5 ratio (use of 1.6 ratio will require elongation of pushrod holes) = Intake Runner: 170cc, standard port location = Exhaust Ports: 65cc, standard location = Combustion Chamber: 67cc or 76cc, straight plug = Spark Plug: 14mm 5/8” .460” reach tapered style. Accel 276 or 276S or equivalent = Valve Job: Multi-angle intake and radiused exhaust = Valve Cover Rail raised w/perimeter and center bolt = Valve Angle: Stock 23° = Accessory Bolt Holes: Stock = 50-State Emissions legal = Accepted by most oval tracks and sanctions as stock replacements. Check rule book. |
58cc chamber is suited for 305 cubic inch SBC -1 = 1.250” valve springs for hydraulic flat tappet cams |
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Improved stock replacement style 23° heads for small block Chevy. World’s SR Torquer provides up to 30HP over stock heads. These heads are designed with extrathick decks and walls for improved reliability as well as equipped with hardened steel exhaust seats that are compatible with today’s unleaded gasolines. They are machined for screw-in rocker arm studs for extra durability. They feature a larger 2.02 Intake Valve and a 1.60 Exhaust Valve. |
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= Material: High density cast iron = Valve Seats: Intake (integral), exhaust (hardened) = Valve Guides: Integral cast iron, machined for .530” seals = Spring Seats: Machined for 1.250” = Valves: Erson stainless steel valves in assemblies = Valve Diameter: 2.020” int, 1.600” exh (11/32” stem) = Rocker Arm Studs: Screw-in style = Rocker Arms: 1.5 ratio (use of 1.6 ratio will require elongation of pushrod holes) = Intake Runner: 170cc, standard port location = Exhaust Ports: 65cc, standard location = Combustion Chamber: 67cc or 76cc, straight plug = Spark Plug: 14mm 5/8” .460” reach tapered style. Accel 276 or 276S or equivalent = Valve Job: Multi-angle intake and radiused exhaust = Valve Cover Rail raised w/perimeter and center bolt = Valve Angle: Stock 23° = Accessory Bolt Holes: Stock = 50-State Emissions legal = Accepted by most oval tracks and sanctions as stock replacements. Check rule book. |
Notes: Requires pushrod guide plates -1 = 1.250” valve springs for hydraulic flat tappet cams |
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The first true aftermarket performance cylinder head, good for 30-70HP over stock, and emissions legal! The industry’s most popular true high performance cast iron cylinder head has been continuously improved since its introduction over 20 years ago. With 200cc intake and 69cc exhaust ports, World’s SPORTSMAN II heads offer 30-70 horsepower gains over OEM heads, yet are 50-state emissions legal (E.O.#D-343-1). |
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= Material: High density cast iron = Valve Seats: Intake (integral), exhaust (hardened) = Valve Guides: Integral cast iron, machined for .530” seals = Spring Seats: Machined for 1.550” = Valves: Erson stainless steel valves in assemblies = Valve Diameter: 2.020” int, 1.600” exh (11/32” stem) = Rocker Arm Studs: Screw-in style = Rocker Arms: 1.5 ratio (use of 1.6 ratio will require elongation of pushrod holes) = Intake Runner: 200cc, standard port location = Exhaust Ports: 69cc, standard location = Combustion Chamber: 50cc, 64cc or 72cc = Straight or angle plugs = Spark Plug: 14mm 5/8” .460” reach tapered style. Accel 276 or 276S or equivalent = Valve Job: Multi-angle intake and radiused exhaust = Valve Cover Rail raised w/perimeter and center bolt = Valve Angle: Stock 23° = Accessory Bolt Holes: Stock = 50-State Emissions legal = Accepted by most oval tracks and sanctions as stock replacements. Check with rule book. |
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Part No. Priced each Priced each |
Intake Port |
Chamber Volume |
Intk/Exh Valves |
Spark Plugs |
Valve Springs |
| 011150 $619.59 | 200cc | 64cc | 2.020/1.600 | Angle | Bare |
| 011150-1 $669.83 | 200cc | 64cc | 2.020/1.600 | Angle | 1.250 |
| 011150-2 $1,022.34 | 200cc | 64cc | 2.020/1.600 | Angle | 1.437 |
| 011150-3 $1,071.74 | 200cc | 64cc | 2.020/1.600 | Angle | 1.540 |
| 011250 $619.59 | 200cc | 64cc | 2.020/1.600 | Straight | Bare |
| 011250-1 $669.83 | 200cc | 64cc | 2.020/1.600 | Straight | 1.250 |
| 011250-2 $1,022.34 | 200cc | 64cc | 2.020/1.600 | Straight | 1.437 |
| 011250-3 $1,071.74 | 200cc | 64cc | 2.020/1.600 | Straight | 1.540 |
| 012150 $619.59 | 200cc | 72cc | 2.020/1.600 | Angle | Bare |
| 012150-1 $669.83 | 200cc | 72cc | 2.020/1.600 | Angle | 1.250 |
| 012150-2 $1,022.34 | 200cc | 72cc | 2.020/1.600 | Angle | 1.437 |
| 012150-3 $1,071.74 | 200cc | 72cc | 2.020/1.600 | Angle | 1.540 |
| 012250 $619.59 | 200cc | 72cc | 2.020/1.600 | Straight | Bare |
| 012250-1 $669.83 | 200cc | 72cc | 2.020/1.600 | Straight | 1.250 |
| 012250-2 $1,022.34 | 200cc | 72cc | 2.020/1.600 | Straight | 1.437 |
| 012250-3 $1,071.74 | 200cc | 72cc | 2.020/1.600 | Straight | 1.540 |
| NEW Sportsman 50cc Chambers | |||||
| 011150-50 $1,129.69 | 200cc | 50cc | 2.020/1.600 | Angle | Bare |
| 011150-50-1 $669.83 | 200cc | 50cc | 2.020/1.600 | Angle | 1.250 |
| 011150-50-2 $1,022.34 | 200cc | 50cc | 2.020/1.600 | Angle | 1.437 |
| 011150-50-3 $1,071.74 | 200cc | 50cc | 2.020/1.600 | Angle | 1.540 |
| 011250-50 $1,129.69 | 200cc | 50cc | 2.020/1.600 | Straight | Bare |
| 011250-50-1 $513.65 | 200cc | 50cc | 2.020/1.600 | Straight | 1.250 |
| 011250-50-2 $783.95 | 200cc | 50cc | 2.020/1.600 | Straight | 1.437 |
| 011250-50-3 $821.83 | 200cc | 50cc | 2.020/1.600 | Straight | 1.540 |
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Racing style 23° iron heads for small block Chevy. Designed for use in racing applications where cast iron heads are mandated or for larger displacement small block street-type engines, World’s 220cc intake MOTOWN heads are the ULTIMATE cast iron SBC head. Employing 220cc intake ports, big 2.080” diameter intake valves and a highly efficient 64cc combustion chamber, the MOTOWN provides significant power increases over other heads on the market. They are ideally suited for high rpm use on small block Chevy engines of 383” or larger displacements. |
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= Material: High density cast iron = Valve Seats: Intake (integral), exhaust (hardened) = Valve Guides: Integral cast iron, machined for .530” seals = Spring Seats: Machined for 1.550” = Valves: Erson stainless steel valves in assemblies = Valve Diameter: 2.080” intake, 1.600” exhaust (11/32” stem) = Rocker Arm Studs: Screw-in style = Rocker Arms: 1.5 ratio (use of 1.6 ratio will require elongation of pushrod holes) = Intake Runner: 220cc, standard port location = Exhaust Ports: 70cc, standard location = Combustion Chamber: 50cc or 64cc = Straight or Angle plugs (Angle only on 50cc heads) = Spark Plug: 14mm 5/8” .460” reach tapered style. Accel 276 or 276S or equivalent = Valve Job: Multi-angle intake and radiused exhaust = Valve Cover Rail raised w/perimeter and center bolt = Valve Angle: Stock 23° = Accessory Bolt Holes: Stock = Accepted by most oval tracks and sanctions as stock replacements. Check with rule book. |
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Part No. Priced each |
Intake Port |
Chamber Volume |
Intk/Exh Valves |
Spark Plugs |
Valve Springs |
| 014150 $619.59 | 220cc | 64cc | 2.080/1.600 | Angle | Bare |
| 014150-1 $669.83 | 220cc | 64cc | 2.080/1.600 | Angle | 1.250 |
| 014150-2 $1,022.34 | 220cc | 64cc | 2.080/1.600 | Angle | 1.437 |
| 014150-3 $1,071.74 | 220cc | 64cc | 2.080/1.600 | Angle | 1.540 |
| 014250 $619.59 | 220cc | 64cc | 2.080/1.600 | Straight | Bare |
| 014250-1 $669.83 | 220cc | 64cc | 2.080/1.600 | Straight | 1.250 |
| 014250-2 $1,022.34 | 220cc | 64cc | 2.080/1.600 | Straight | 1.437 |
| 014250-3 $1,071.74 | 220cc | 64cc | 2.080/1.600 | Straight | 1.540 |
| New Motown 50cc Chambers | |||||
| 014150-50 $1,129.69 | 220cc | 50cc | 2.080/1.600 | Angle | Bare |
| 014150-50-1 $669.83 | 220cc | 50cc | 2.080/1.600 | Angle | 1.250 |
| 014150-50-2 $1,022.34 | 220cc | 50cc | 2.080/1.600 | Angle | 1.437 |
| 014150-50-3 $1,071.74 | 220cc | 50cc | 2.080/1.600 | Angle | 1.540 |
|
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  |
|
Rectangle port 24° iron performance heads for big block Chevy. The cast iron MERLIN rectangular port design is available with intake ports in 320 and 345cc configurations. Choose the port size that will provide the optimum balance of flow and velocity for your engine combination. They are available bare or in complete assemblies that feature multiangle valve jobs, Erson stainless steel valves and valve springs matched to camshaft requirements. World Products Merlin cylinder heads for big block Chevys combine large intake runners with open combustion chambers to produce good torque and low-end power. |
|
= Material: High density cast iron = Valve Seats: Intake (integral), exhaust (hardened) = Valve Guides: Integral cast iron = Spring Seats: Machined for 1.550” (1.625” max.) = Valves: Erson stainless steel valves in assemblies (inconel exhaust valves on marine applications) = Valve Diameter: 2.300” intake, 1.880” exhaust (11/32” stem) = Guide Plates: Stock = Rocker Arm Studs: Screw-in style = Rocker Arms: Standard = Intake Runner: 320 or 345cc, standard port location = Exhaust Ports: 137cc, Raised .600 = Combustion Chamber: 119cc = Spark Plug: 14mm 5/8” .460” reach tapered style, Accel 276 or 276S or equivalent = Valve Job: Multi-angle intake and radiused exhaust = Valve Cover Rail: Raised = Valve Angle: Stock 24° = Accessory Bolt Holes: Stock = Chamber Design: Open |
|
Part No. Priced each |
Intake Port |
Chamber Volume |
Intk/Exh Valves |
Port Shape |
Valve Springs |
| 030620 $951.35 | 320cc | 119cc | 2.300/1.880 | Rect | Bare |
| 030620-1 $1,028.48 | 320cc | 119cc | 2.300/1.880 | Rect | 1.500S |
| 030620-2 $1,250.41 | 320cc | 119cc | 2.300/1.880 | Rect | 1.460D |
| 030620M-2 | 320cc | 119cc | 2.300/1.880 | Rect | 1.460D |
| 030620-3 $1,287.41 | 320cc | 119cc | 2.300/1.880 | Rect | 1.550D |
| 030630 $951.35 | 345cc | 119cc | 2.300/1.880 | Rect | Bare |
| 030630-1 $1,028.48 | 345cc | 119cc | 2.300/1.880 | Rect | 1.500S |
| 030630-2 $1,250.41 | 345cc | 119cc | 2.300/1.880 | Rect | 1.460D |
| 030630-3 $1,287.41 | 345cc | 119cc | 2.300/1.880 | Rect | 1.550D |
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  |
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Oval port 24° iron performance heads for big block Chevy. World’s MERLIN series has earned a reputation as the performance industry standard for Big Block Chevy power. The 269cc oval port design provides great low to mid-range power and throttle response for street and racing engines up to 496 cubic inches. They are available bare or in complete assemblies that feature multi-angle valve jobs, Erson stainless steel valves and valve springs matched to camshaft requirements. |
|
= Material: High density cast iron = Valve Seats: Intake (integral), exhaust (hardened) = Valve Guides: Integral cast iron = Spring Seats: Machined for 1.550” (can machine to 1.625”) = Valves: Erson stainless steel valves in assemblies (inconel exhaust valves on marine applications) = Valve Diameter: 2.300” intake, 1.880” exhaust (11/32” stem) = Guide Plates: Stock = Rocker Arm Studs: Screw-in style = Rocker Arms: Standard = Intake Runner: 269cc, standard port location = Exhaust Ports: 137cc, Raised .600 = Combustion Chamber: 119cc = Spark Plug: 14mm 5/8” .460” reach tapered style, Accel 276 or 276S or equivalent = Valve Job: Multi-angle intake and radiused exhaust = Valve Cover Rail: Raised = Valve Angle: Stock 24° = Accessory Bolt Holes: Stock = Chamber Design: Open |
|
Part No. Priced each |
Intake Port |
Chamber Volume |
Intk/Exh Valves |
Port Shape |
Valve Springs |
| 030040 $951.35 | 269cc | 119cc | 2.300/1.880 | Oval | Bare |
| 030040-1 $1,028.48 | 269cc | 119cc | 2.300/1.880 | Oval | 1.500S |
| 030040-2 $1,250.41 | 269cc | 119cc | 2.300/1.880 | Oval | 1.460D |
| 030040M-2 | 269cc | 119cc | 2.300/1.880 | Oval | 1.460D |
|
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  |
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High performance replacement 20° iron heads for small block Ford. When it comes to high performance replacements for factory cast iron heads, World’s WINDSOR SR. boasting 200cc intake ports, plus 64cc exhausts ports that are substantially larger than OEM Ford heads. Add a highly efficient combustion chamber design and larger valves and you have big bolt-on power. Marine applications are also available upon request, equipped with high temperature inconel exhaust valves. The WINDSOR series of heads are the cost-effective choice for serious power from your 302/351 |
|
= Material: High density cast iron = Valve Seats: Intake (integral), exhaust (hardened) = Valve Guides: Integral cast iron = Spring Seats: Machined for 1.550” (can machine to 1.625”) = Valves: Erson stainless steel valves in assemblies (inconel exhaust valves on marine applications) = Valve Diameter: 2.020” intake, 1.600” exhaust (11/32” stem) = Rocker Arm Studs: Screw-in style = Rocker Arms: Adjustable rockers recommended. 1.6 ratio (use of 1.73 ratio will require elongation of pushrod holes) = Intake Runner: 200cc, standard port location = Exhaust Ports: 64cc, standard location (dual exhaust bolt pattern to accommodate large custom headers) = Combustion Chamber: 64cc = Spark Plug: 14mm 5/8” .460” reach tapered style, Accel 276 or 276S or equivalent = Valve Job: Multi-angle intake and radiused exhaust = Valve Cover Rail: Raised = Valve Angle: Stock 20° = Accessory Bolt Holes: Stock |
Notes: Requires pushrod guide plates -1 = 1.500” valve springs for hydraulic flat tappet cams -2 = 1.437” valve springs for solid flat tappet or hyd roller -3 = 1.540” valve springs for solid roller cams |
|
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  |
|
Improved replacement 20° iron performance heads for small block Ford. When it comes to high performance replacements for factory cast iron heads, World’s WINDSOR JR. has the market covered with 180cc intake runners, plus the 64cc exhausts ports are substantially larger than OEM Ford heads. Add a highly efficient combustion chamber design and larger valves and you have big bolt-on power. |
|
Part No. Priced each |
Intake Port |
Chamber Volume |
Intk/Exh Valves |
Valve Springs |
| 053030 $654.25 | 180cc | 58cc | 1.940/1.600 | Bare |
| 053030-1 $707.29 | 180cc | 58cc | 1.940/1.600 | 1.500S |
| 053030-2 $1,039.89 | 180cc | 58cc | 1.940/1.600 | 1.437D |
| 053030-3 $1,094.36 | 180cc | 58cc | 1.940/1.600 | 1.540D |
|
= Material: High density cast iron = Valve Seats: Intake (integral), exhaust (hardened) = Valve Guides: Integral cast iron = Spring Seats: Machined for 1.550” (can machine to 1.625”) = Valves: Erson stainless steel valves in assemblies (inconel exhaust valves on marine applications) = Valve Diameter: 1.940” intake, 1.600” exhaust (11/32” stem) = Rocker Arm Studs: Screw-in style = Rocker Arms: Adjustable rockers recommended. 1.6 ratio (use of 1.73 ratio will require elongation of pushrod holes) = Intake Runner: 180cc, standard port location = Exhaust Ports: 64cc, standard location (dual exhaust bolt pattern to accommodate large custom headers) = Combustion Chamber: 58cc = Spark Plug: 14mm 5/8” .460” reach tapered style, Accel 276 or 276S or equivalent = Valve Job: Multi-angle intake and radiused exhaust = Valve Cover Rail: Raised = Valve Angle: Stock 20° = Accessory Bolt Holes: Stock |
|
Main Fasteners World SBC w/new 7/16" fasteners |
Cylinder Head Stud Kits Chevrolet |
|||
| WPI701406 | Billet cap Stud kit | 134-4001 $234.32 | 23° OEM iron/alum ChevGen lll Vortec/Trk hex head | |
| WPI701407 | Nodular cap Bolt kitWorld BBC Merlin III | 234-4401 $287.89 | 23° OEM iron/alum ChevGen lll Vortec/Trk 12 pt | |
| WPI701414 | BBC nodular cap bolt kitWorld BBC Merlin IV | 234-4301 $281.05 | 23° OEM iron/alum ChevGen lll Vortec/Trk 12 pt u/cut | |
| WPI701416 | BBC billet cap stud kit | 234-4601 $291.16 | BBC Cast OEM, Alum factory heads, also early Bowtie | |
| WPI701413 | BBC nodular cap bolt kitWorld SBF w/ New 7/16 fasteners | Ford World SBF | ||
| WPI701432 | Billet cap stud kit | WPI705027 | OEM & most aftermarket | |
| WPI701431 | Nodular cap bolt kitHead Bolt KitsChevrolet - Black Oxide |
Rocker Studs Chevrolet |
||
| 134-3601 $116.34 | SB 23° cast iron OEM, GEN 111 Vortec/ Truck & most Edelbrock LT-AFR, Brodix-8,-10, -11, -11xb, LT-1, Pro-1, Hex | 134-7101 $67.52 | SB 3/8 typical application | |
| 134-7104 $67.52 | SB 3/8 w/roller rockers | |||
| 134-7103 $67.52 | SB 7/16 typical application | |||
| 134-3701 $122.20 | SB 23° cast iron OEM, GEN 111 Vortec/ Truck & most Edelbrock LT-AFR, Brodix -8,-10, -11, -11xb, LT-1, Pro-1, 12 pt | 235-7204 $89.67 | SB Alum. heads int. studs | |
| 235-7203 $89.67 | SB Alum. heads Exh. studs | |||
|
Part No. Priced each |
Intake Port | Chamber Volume | Intk/Exh Valves | Spark Plugs | Valve Springs |
| 042650 $519.09 | 170cc | 58cc | 1.940/1.500 | Straight | Bare |
| 042650-1 $561.18 | 170cc | 58cc | 1.940/1.500 | Straight | 1.250 |
| 043600 $519.09 | 170cc | 76cc | 1.940/1.500 | Straight | Bare |
| 043600-1 $561.18 | 170cc | 76cc | 1.940/1.500 | Straight | 1.250 |
| 043610 $519.09 | 170cc | 67cc | 1.940/1.500 | Straight | Bare |
| 043610-1 $561.18 | 170cc | 67cc | 1.940/1.500 | Straight | 1.250 |
| '86-'95 Intake Face w/Center Bolt Valve Covers | |||||
| 043650 $519.09 | 170cc | 67cc | 1.940/1.500 | Straight | Bare |
| 043650-1 $561.18 | 170cc | 67cc | 1.940/1.500 | Straight | 1.250 |
|
Notes: 58cc chamber is suited for 305 cubic inch SBC-1:
1.250" valve springs for hydraulic flat tappet camsValve
Train Parts Kit Valves, Springs, Retainers, Locks and Seals -For 1 HeadWPISRVT-1 |
|||||
|
Part No. Priced each |
Intake Port | Chmbr Volume | Intk/Exh Valves | Spark Plugs | Valve Springs |
| 011150 $619.59 | 200cc | 64cc | 2.020/1.600 | Angle | Bare |
| 011150-1 $669.83 | 200cc | 64cc | 2.020/1.600 | Angle | 1.250 |
| 011150-2 $1,022.34 | 200cc | 64cc | 2.020/1.600 | Angle | 1.437 |
| 011150-3 $1,071.74 | 200cc | 64cc | 2.020/1.600 | Angle | 1.540 |
| 011250 $619.59 | 200cc | 64cc | 2.020/1.600 | Straight | Bare |
| 011250-1 $669.83 | 200cc | 64cc | 2.020/1.600 | Straight | 1.250 |
| 011250-2 $1,022.34 | 200cc | 64cc | 2.020/1.600 | Straight | 1.437 |
| 011250-3 $1,071.74 | 200cc | 64cc | 2.020/1.600 | Straight | 1.540 |
| 012150 $619.59 | 200cc | 72cc | 2.020/1.600 | Angle | Bare |
| 012150-1 $669.83 | 200cc | 72cc | 2.020/1.600 | Angle | 1.250 |
| 012150-2 $1,022.34 | 200cc | 72cc | 2.020/1.600 | Angle | 1.437 |
| 012150-3 $1,071.74 | 200cc | 72cc | 2.020/1.600 | Angle | 1.540 |
| 012250 $619.59 | 200cc | 72cc | 2.020/1.600 | Straight | Bare |
| 012250-1 $669.83 | 200cc | 72cc | 2.020/1.600 | Straight | 1.250 |
| 012250-2 $1,022.34 | 200cc | 72cc | 2.020/1.600 | Straight | 1.437 |
| 012250-3 $1,071.74 | 200cc | 72cc | 2.020/1.600 | Straight | 1.540 |
| 011150-50 $1,129.69 | 200cc | 50cc | 2.020/1.600 | Angle | Bare |
| 011150-50-1 $669.83 | 200cc | 50cc | 2.020/1.600 | Angle | 1.250 |
| 011150-50-2 $1,022.34 | 200cc | 50cc | 2.020/1.600 | Angle | 1.437 |
| 011150-50-3 $1,071.74 | 200cc | 50cc | 2.020/1.600 | Angle | 1.540 |
| 011250-50 $1,129.69 | 200cc | 50cc | 2.020/1.600 | Straight | Bare |
| 011250-50-1 $513.65 | 200cc | 50cc | 2.020/1.600 | Straight | 1.250 |
| 011250-50-2 $783.95 | 200cc | 50cc | 2.020/1.600 | Straight | 1.437 |
| 011250-50-3 $821.83 | 200cc | 50cc | 2.020/1.600 | Straight | 1.540 |
| Notes: Requires pushrod guide plates-1: 1.250" valve springs for hydraulic flat tappet cams-2: 1.437" valve springs for solid flat tappet or hyd roller cams-3: 1.540" valve springs for solid roller camsValve Train Parts Kit Valves, Springs, Retainers, Locks and Seals -For 1 HeadWPISPORTSMANVT-1 WPISPORTSMANVT-2 WPISPORTSMANVT-3 | |||||
|
Part No. Priced each |
Intake Port | Chmbr Volume | Intk/Exh Valves | Spark Plugs | Valve Springs |
| 014150 $619.59 | 220cc | 64cc | 2.080/1.600 | Angle | Bare |
| 014150-1 $669.83 | 220cc | 64cc | 2.080/1.600 | Angle | 1.250 |
| 014150-2 $1,022.34 | 220cc | 64cc | 2.080/1.600 | Angle | 1.437 |
| 014150-3 $1,071.74 | 220cc | 64cc | 2.080/1.600 | Angle | 1.540 |
| 014250 $619.59 | 220cc | 64cc | 2.080/1.600 | Straight | Bare |
| 014250-1 $669.83 | 220cc | 64cc | 2.080/1.600 | Straight | 1.250 |
| 014250-2 $1,022.34 | 220cc | 64cc | 2.080/1.600 | Straight | 1.437 |
| 014250-3 $1,071.74 | 220cc | 64cc | 2.080/1.600 | Straight | 1.540 |
| 014150-50 $1,129.69 | 220cc | 50cc | 2.080/1.600 | Angle | Bare |
| 014150-50-1 $669.83 | 220cc | 50cc | 2.080/1.600 | Angle | 1.250 |
| 014150-50-2 $1,022.34 | 220cc | 50cc | 2.080/1.600 | Angle | 1.437 |
| 014150-50-3 $1,071.74 | 220cc | 50cc | 2.080/1.600 | Angle | 1.540 |
| Notes: Requires pushrod guide plates-1: 1.250" valve springs for hydraulic flat tappet cams-2: 1.437" valve springs for solid flat tappet or hyd roller cams-3: 1.540" valve springs for solid roller camsValve Train Parts Kit Valves, Springs, Retainers, Locks and Seals -For 1 HeadWPIMOTOWNVT-1 WPIMOTOWNVT-2 WPIMOTOWNVT-3 | |||||
Page 27
MERLIN RECTANGLE
PORT BBC Cylinder Heads
Big Block Chevy
|
Part No. Priced each |
Intake Port | Chmbr Volume | Intk/Exh Valves | Port Shape | Valve Springs |
| 030620 $951.35 | 320cc | 119cc | 2.300/1.880 | Rect | Bare |
| 030620-1 $1,028.48 | 320cc | 119cc | 2.300/1.880 | Rect | 1.500S |
| 030620-2 $1,250.41 | 320cc | 119cc | 2.300/1.880 | Rect | 1.460D |
| 030620M-2 | 320cc | 119cc | 2.300/1.880 | Rect | 1.460D |
| 030620-3 $1,287.41 | 320cc | 119cc | 2.300/1.880 | Rect | 1.550D |
| 030630 $951.35 | 345cc | 119cc | 2.300/1.880 | Rect | Bare |
| 030630-1 $1,028.48 | 345cc | 119cc | 2.300/1.880 | Rect | 1.500S |
| 030630-2 $1,250.41 | 345cc | 119cc | 2.300/1.880 | Rect | 1.460D |
| 030630-3 $1,287.41 345cc 119cc 2.300/1.880 Rect 1.550DNotes:-1: 1.500" valve springs for hydraulic flat tappet cams-2: 1.460" valve springs for solid flat tappet or hyd roller camsM-2: -2 Assembly with Inconel exhaust valve for Marine use-3: 1.550" valve springs for solid roller camsValve Train Parts Kit Valves, Springs, Retainers, Locks and Seals -For 1 HeadWPIMERLINVT-1 WPIMERLINVT-2WPIMERLINVT-3 | |||||
Page 28
MERLIN OVAL PORT
BBC Cylinder Heads
Big Block Chevy
|
Part No. Priced each |
Intake Port |
Chamber Volume |
Intk/Exh Valves |
Port Shape |
Valve Springs |
| 030040 $951.35 | 269cc | 119cc | 2.300/1.880 | Oval | Bare |
| 030040-1 $1,028.48 | 269cc | 119cc | 2.300/1.880 | Oval | 1.500S |
| 030040-2 $1,250.41 | 269cc | 119cc | 2.300/1.880 | Oval | 1.460D |
| 030040M-2 | 269cc | 119cc | 2.300/1.880 | Oval | 1.460D |
Page 29
WINDSOR SR. SBF Cylinder Heads
Small Block Ford
|
Part No. Priced each |
Intake Port |
Chamber Volume |
Intk/Exh Valves |
Valve Springs |
| 053040 $654.25 | 200cc | 64cc | 2.020/1.600 | Bare |
| 053040-1 $707.29 | 200cc | 64cc | 2.020/1.600 | 1.500S |
| 053040-2 $1,039.89 | 200cc | 64cc | 2.020/1.600 | 1.437D |
| 053040-3 $1,094.36 | 200cc | 64cc | 2.020/1.600 | 1.540D |
Page 30
WINDSOR JR.
SBF Cylinder Heads
Small Block Ford
|
Part No. Priced each |
Intake Port |
Chamber Volume |
Intk/Exh Valves |
Valve Springs |
| 053030 $654.25 | 180cc | 58cc | 1.940/1.600 | Bare |
| 053030-1 $707.29 | 180cc | 58cc | 1.940/1.600 | 1.500S |
| 053030-2 $1,039.89 | 180cc | 58cc | 1.940/1.600 | 1.437D |
| 053030-3 $1,094.36 | 180cc | 58cc | 1.940/1.600 | 1.540D |
